Explicit include string.h in KTRSAMATReader.cc

I had to add a include string.h in KTRSAMATReader.cc to make it work on
a gentoo system.
Added FindMatlab.cmake, an improvement over the default CMake version.
Implemented its use in the top-level CMakeLists file.
Merge branch 'Maintenance' of ssh://github.com/project8/katydid into Maintenance

Conflicts:
	Source/Egg/CMakeLists.txt
Merge branch 'develop' into Maintenance